mei: use helper function to find me client by id

We already have a helper to find me client by id, let's
use it in all relevant places.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mei/client.c

@@ -552,7 +552,8 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file)
 int mei_cl_flow_ctrl_creds(struct mei_cl *cl)
 {
 	struct mei_device *dev;
-	int i;
+	struct mei_me_client *me_cl;
+	int id;
 
 	if (WARN_ON(!cl || !cl->dev))
 		return -EINVAL;
@@ -565,19 +566,19 @@ int mei_cl_flow_ctrl_creds(struct mei_cl *cl)
 	if (cl->mei_flow_ctrl_creds > 0)
 		return 1;
 
-	for (i = 0; i < dev->me_clients_num; i++) {
-		struct mei_me_client  *me_cl = &dev->me_clients[i];
-		if (me_cl->client_id == cl->me_client_id) {
-			if (me_cl->mei_flow_ctrl_creds) {
-				if (WARN_ON(me_cl->props.single_recv_buf == 0))
-					return -EINVAL;
-				return 1;
-			} else {
-				return 0;
-			}
-		}
+	id = mei_me_cl_by_id(dev, cl->me_client_id);
+	if (id < 0) {
+		cl_err(dev, cl, "no such me client %d\n", cl->me_client_id);
+		return id;
 	}
-	return -ENOENT;
+
+	me_cl = &dev->me_clients[id];
+	if (me_cl->mei_flow_ctrl_creds) {
+		if (WARN_ON(me_cl->props.single_recv_buf == 0))
+			return -EINVAL;
+		return 1;
+	}
+	return 0;
 }
 
 /**
@@ -593,32 +594,31 @@ int mei_cl_flow_ctrl_creds(struct mei_cl *cl)
 int mei_cl_flow_ctrl_reduce(struct mei_cl *cl)
 {
 	struct mei_device *dev;
-	int i;
+	struct mei_me_client *me_cl;
+	int id;
 
 	if (WARN_ON(!cl || !cl->dev))
 		return -EINVAL;
 
 	dev = cl->dev;
 
-	if (!dev->me_clients_num)
-		return -ENOENT;
+	id = mei_me_cl_by_id(dev, cl->me_client_id);
+	if (id < 0) {
+		cl_err(dev, cl, "no such me client %d\n", cl->me_client_id);
+		return id;
+	}
 
-	for (i = 0; i < dev->me_clients_num; i++) {
-		struct mei_me_client  *me_cl = &dev->me_clients[i];
-		if (me_cl->client_id == cl->me_client_id) {
-			if (me_cl->props.single_recv_buf != 0) {
-				if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0))
-					return -EINVAL;
-				dev->me_clients[i].mei_flow_ctrl_creds--;
-			} else {
-				if (WARN_ON(cl->mei_flow_ctrl_creds <= 0))
-					return -EINVAL;
-				cl->mei_flow_ctrl_creds--;
-			}
-			return 0;
-		}
+	me_cl = &dev->me_clients[id];
+	if (me_cl->props.single_recv_buf != 0) {
+		if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0))
+			return -EINVAL;
+		me_cl->mei_flow_ctrl_creds--;
+	} else {
+		if (WARN_ON(cl->mei_flow_ctrl_creds <= 0))
+			return -EINVAL;
+		cl->mei_flow_ctrl_creds--;
 	}
-	return -ENOENT;
+	return 0;
 }
 
 /**

drivers/misc/mei/hbm.c

@@ -22,6 +22,7 @@
 #include "mei_dev.h"
 #include "hbm.h"
 #include "hw-me.h"
+#include "client.h"
 
 static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status)
 {
@@ -340,27 +341,34 @@ int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)
  *
  * @dev: the device structure
  * @flow: flow control.
+ *
+ * return 0 on success, < 0 otherwise
  */
-static void mei_hbm_add_single_flow_creds(struct mei_device *dev,
+static int mei_hbm_add_single_flow_creds(struct mei_device *dev,
 				  struct hbm_flow_control *flow)
 {
-	struct mei_me_client *client;
-	int i;
-
-	for (i = 0; i < dev->me_clients_num; i++) {
-		client = &dev->me_clients[i];
-		if (client && flow->me_addr == client->client_id) {
-			if (client->props.single_recv_buf) {
-				client->mei_flow_ctrl_creds++;
-				dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n",
-				    flow->me_addr);
-				dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n",
-				    client->mei_flow_ctrl_creds);
-			} else {
-				BUG();	/* error in flow control */
-			}
-		}
+	struct mei_me_client *me_cl;
+	int id;
+
+	id = mei_me_cl_by_id(dev, flow->me_addr);
+	if (id < 0) {
+		dev_err(&dev->pdev->dev, "no such me client %d\n",
+			flow->me_addr);
+		return id;
 	}
+
+	me_cl = &dev->me_clients[id];
+	if (me_cl->props.single_recv_buf) {
+		me_cl->mei_flow_ctrl_creds++;
+		dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n",
+		    flow->me_addr);
+		dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n",
+		    me_cl->mei_flow_ctrl_creds);
+	} else {
+		BUG();	/* error in flow control */
+	}
+
+	return 0;
 }
 
 /**